:root{
  --bg:#f5f5f5; --card:#ffffff; --text:#1a2a2e; --muted:rgba(26,42,46,.68);
  --line:rgba(26,42,46,.12); --accent:#1e88e5; --ok:#43a047;
  --radius:16px; --max:760px;
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
@media (prefers-color-scheme:dark){
  :root{ --bg:#1a2a2e; --card:#16213e; --text:#ffffff; --muted:rgba(255,255,255,.68); --line:rgba(255,255,255,.12); --accent:#4aa3f0; }
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);line-height:1.6;font-size:16px}
a{color:var(--accent)}
.wrap{max-width:var(--max);margin:0 auto;padding:0 16px}
header.top{border-bottom:1px solid var(--line)}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:14px;padding-bottom:14px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:var(--text);text-decoration:none}
.brand img{width:32px;height:32px;border-radius:8px}
nav.links{display:flex;gap:14px;flex-wrap:wrap;font-size:14px}
nav.links a{text-decoration:none;color:var(--muted)}
nav.links a[aria-current=page]{color:var(--text);font-weight:600}
.lang{display:inline-flex;border:1px solid var(--line);border-radius:999px;overflow:hidden}
.lang button{background:none;border:0;color:var(--muted);padding:4px 12px;font:inherit;font-size:13px;cursor:pointer}
.lang button.on{background:var(--accent);color:#fff}
main{padding:32px 0 48px}
h1{font-size:30px;line-height:1.2;margin:0 0 8px}
h2{font-size:20px;margin:32px 0 8px}
h3{font-size:16px;margin:20px 0 4px}
.updated{color:var(--muted);font-size:14px;margin:0 0 24px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin:16px 0}
ul{padding-left:20px}
li{margin:4px 0}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{text-align:left;padding:8px 6px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-weight:600}
.table-scroll{overflow-x:auto}
.hero{text-align:center;padding:24px 0 8px}
.hero img{width:96px;height:96px;border-radius:22px;box-shadow:0 8px 24px rgba(0,0,0,.18)}
.hero p{color:var(--muted);max-width:560px;margin:8px auto 0}
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:12px;margin-top:24px}
.features .card{margin:0}
.features h3{margin-top:0}
.btn{display:inline-block;background:var(--accent);color:#fff;text-decoration:none;font-weight:600;padding:12px 20px;border-radius:12px}
details{border-bottom:1px solid var(--line);padding:12px 0}
summary{cursor:pointer;font-weight:600}
footer{border-top:1px solid var(--line);color:var(--muted);font-size:13px;padding:20px 0 32px}
footer .wrap{display:flex;gap:16px;flex-wrap:wrap;justify-content:space-between}
[data-lang]{display:none}
html[lang=tr] [data-lang=tr], html[lang=en] [data-lang=en]{display:block}
html[lang=tr] span[data-lang=tr], html[lang=en] span[data-lang=en]{display:inline}